So I have an issue with the rendering(gets stuck), and that's why I use the Import > Media method to render my videos. It has worked, but recently there has been a problem with the audio.

When I import the video, the audio from the video file that I edited doesn't work, but a MP3 file that I added as background music works.

Example if you don't understand ; http://i.imgur.com/xv52qwy.png